338 BOTANICAL GAZETTE [MAY 
TYPES OF PLASTID INHERITANCE 
There have been described numerous cases of chlorophyll 
variation which involve an unequal and frequently a very irregular 
distribution of green color in various regions of the plant. The 
inheritance of such color patterns has not been found always to 
conform to the behavior usually ascribed to Mendelian characters. 
A number of these cases will be reviewed briefly, and for convenience 
those which have been reported in maize and other known cases 
will be considered separately. 
PLANTS OTHER THAN MAIZE.—A large number of more or less 
distinct color patterns have been shown to behave as simple Men- 
delian recessives. Albino seedlings, devoid of chlorophyll and which 
consequently die in the seedling stage, have been reported in 
Antirrhinum latifolium and Melandrium album by Baur (3), in 
Hordeum distichum by KitEss.inG (38), and in Phaseolus vulgaris 
by TyeBBes and Koorman (55). Pale green seedlings have been 
described in Urtica pilulifera by Correns (6), and in Ipomoea 
hederacea by Miyazawa (49). Yellowish green seedlings have 
been reported in Mirabilis jalapa xantha by Correns (7), and in 
Nicotiana rustica by ALLARD (1). Various types of chlorophyll 
variegation have also been shown to be inherited as simple Mendel- 
_ jan recessives: in Aquilegia vulgaris by BAuR (3), in Piswm arvense 
by Kajanus (37), and in Capsella bursa-pastoris and Arabis albida 
_ by Correns (8). 
In other cases similar characters do not seem to be inherited in 
a Mendelian fashion, but are transmitted from one generation to 
the next through the female parent alone. Since the male parent 
does not seem to be definitely concerned in the transmission of the 
character, such cases have been called “maternal inheritance.’’ 
The first case of this sort was described by Correns (6) in Mirabilis 
jalapa albomaculata. Plants of this strain produce branches 
having green leaves, others having white leaves, and still others with 
leaves which are partly green and partly white. All types of 
branches occur on the same plant, and all bear flowers. It was 
found that flowers from a green branch when self-fertilized produced 
only green seedlings in the following generation, and bred true 
thereafter. When crosses were made between flowers of green 
